"Our family remains heartbroken at his passing, but (we) are striving to carry on in a manner which we are sure would be consistent with his wishes," a letter signed by Ken, Deanna and Brianna Grant states. The full statement is below.

Surveillance video from a medical office building on Care Lane showed him breaking into the building in the early morning hours of Sunday, March 6, apparently disoriented, wearing only a T-shirt, boxer shorts and a sock. He severely injured himself during the break-in, and after spending a short time in the building left through the front door. His body was discovered a in the brook a few hundred yards away.

Authorities hoped the toxicology report would give some insight into his bizarre behavior, but after six months and two different sets of tests, the family said "the autopsy results fail to answer key questions as to how the young man we loved so much could have sustained the state of disorientation that characterized his last few hours on this earth."

In the statement, the family thanked the Saratoga County district attorney and the Saratoga Springs Police Department, which they said "lightened our burden during our darkest hours, and ... we will not forget their professionalism, kindness and humanity towards us across the full time period of our tragic ordeal."

The Saratoga Springs Police Department issued a statement confirming the lack of narcotics in Grant's system, but declined to comment on any other specifics of the toxicology report.

"At this time the investigation has not been completed and the Police Department will refrain from commenting on specifics of the autopsy report until all reasonable leads have been investigated," the statement reads. It also states that the investigation will conclude "in the very near future."

The family also expressed their disappointment "that some of the people involved in this tragedy have not come forward with the information necessary for us to understand what happened to Alex on the night of March 5, 2011."

They asked anyone with information about Grant's final hours to come forward to the Saratoga Springs Police Department or the family.

"We view it as our solemn responsibility to do everything in our power to better understand this tragedy, and will continue our labors in this regard for as long as it takes to obtain the answers to which we are entitled," the letter states.

The family started the Alexander Maxwell Grant Foundation to honor the student's memory. It is dedicated to assisting artistically and musically inclined young people from disadvantaged backgrounds. More information can be found at AlexGrant.org.

The Saratoga Springs Police Department and Saratoga County district attorney could not be reached for comment at the time of publication.